US3757803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic cigarette filtering arrangement
Assignee: Individual
•
Filing: 1972-10-02
•
Granted: 1973-09-11
•
Expires: 1992-10-02
Abstract
Abstract A cigarette holder is disclosed which establishes a nonuniform electric field in a cigarette so that not only positvely and negatively charged particles entrained in the cigarette smoke may be precipitated but also so that neutrally charged particles may be precipitated. Neutrally charged particles are polarized by the presence of the electric field. Once polarized, the nonuniform entensity of the electric field exerts a net mechanical force on the particle causing it to be precipitated. The nonuniform electric field is provided between one or more needle-like electrodes which pierce the tobacco or filter tip of the cigarette and a surrounding cylindircal electrode. A power supply energizes the electrodes with sufficient voltage to provide a polarizing electric field at an intensity below the threshold that would ionize particles.
Inventors
- 👤 T Chiang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:07
CPC Classifications
A; A24; A24F; A24F13/00; A24F13/02; A24F13/04; A24F13/06; Y; Y10; Y10S; Y10S55/00; Y10S55/38
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
An arrangement for improving the filtering effectiveness of a cigarette without materially increasing the smoke flow resistance thereof to the smoker comprising an electrically insulating cigarette holder having an outer hollow electrode for embracing an end portion of said cigarette and at least one needle-shaped electrode within said hollow electrode locaTed within the fibers of said end of said cigarette, and means for energizing said electrodes to produce a nonuniform electric field gradient in the end of said cigarette between said electrodes, said electric field gradient having a value varying from less than 30 kilovolts per centimeter immediately adjacent to the sharp end of said needle electrode to approximately 2 kilovolts per centimeter adjacent the surface of said cylindrical electrode.
Claim 2
Dependent Claim
120 words
An arrangement for improving the filtering effectiveness of a cigarette without materially increasing the smoke flow resistance thereof to the smoker comprising an electrically insulating cigarette holder having an outer hollow electrode for embracing an end portion of said cigarette and at least one needle-shaped electrode within said hollow electrode locaTed within the fibers of said end of said cigarette, and means for energizing said electrodes to produce a nonuniform electric field gradient in the end of said cigarette between said electrodes, said electric field gradient having a value varying from less than 30 kilovolts per centimeter immediately adjacent to the sharp end of said needle electrode to approximately 2 kilovolts per centimeter adjacent the surface of said cylindrical electrode.
Claim 3
Dependent Claim
23 words
An arrangement according to claim 1 wherein said holder includes a compartment for containing a miniaturized electronic power supply for energizing said electrodes.
Claim 4
Dependent Claim
30 words
An arrangement according to claim 1 further comprising a ring member supported within said insulating holder, said ring member providing a mounting base for a plurality of said needle-shaped electrodes.
Claim 5
Dependent Claim
76 words
An arrangement according to claim 3 wherein said needle electrode is centrally supported within said holder and insulated from said ring member and wherein one terminal of said power supply is connected to both said outer cylinder and said inner central electrode and the other terminal of said power supply is connected to said ring member of the needle-shaped electrodes protruding from said ring member being interposed between said central electrode and said outer cylindrical electrode.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |